USED This 5/8" horizontal milk valve is made of stainless steel and plastic. It does not contain the button, spring or gasket. There are three different versions available as shown in the photo above. Some have one spring around the pin, some have two springs around the pins, and some have no springs around the pins. The overall measurement is 3 5/8" long by 2" wide and it is 1 7/16" high.